[NJ98GT]

Good Afternoon Guys and Ladies,

I'm new to allfordmustangs.com and also new to the Mustang world as I recently purchased a 98 Black on Black Mustang GT. Before owning this car I was never much into tinkering or playing mechanic, but owning a Mustang has quickly changed that. I'm now attempting to take things apart, research online and buying every manual I can find.

Now to my exhaust question. I've notice that the 98 GT has 6 catalytic converts (3 on each side). Not only do I think that this is highly restrictive the exit of fumes, but kills 60% of the sound. What are my options in this area.

1. Can I remove the section of pipe that holds the 3 cats on each side and bolt on a test pipe between inspections? Once insepction comes up, I would bolt the piece of pipe for each side with the 3 cats back on. Will the car be toooo loud if I do this? What would I do with the O2 sensors? Will this kill performance and milage with no back pressure?

2. Can I simply remove the last 2 on each side opening it up a bit?

3. If I want high flow cats would I have to buy 3 for each side totaling 6 which would break the bank?

I'm open to thoughts and suggestions. Thanks!

[MustDangRider]

YOu could buy a new H or X pipe and just swap them when inspection time comes up.

[NJ98GT]

Thanks for the response.

Would this make the car TOOOO loud? I don't want it to be ear piercing. Would it kill performance or would I lose tons too much back pressure? What would I do with the O2 sensors?

[rbrowntech]

You can get good quality x pipes with cats. Or a good cat back system. I have a 95 gt with and off road x pipe and flow master 40s mufflers. It sounds good, it is a bit loud, but not too loud.There are so many options out there for you.
p.s welcome to the board.

[THEFURYV8]

There is nothing wrong with loud if it sounds good check out Mustang Parts & Performance - American Muscle They will have the solution for you. I have pypes x pipes with high flow cats sounds with flowmaster catbacks. Soon im going to be switching it up though and going with long tube headers and off road x pipes though

[98 GT]

here is 2 clips of my car. i have mac cat back with a high flow catted x mid-pipe

YouTube - 98 mustang gt bassani catted x mac catback

YouTube - mustang fun